Malicious PDF — malware analysis report

Static analysis result for SHA-256 9899d0bbc314c911…

MALICIOUS

PDF

56.4 KB Created: 2020-10-31 15:40:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 38e2a33a08631b9da6442114a41020e7 SHA-1: ce5b407dd2ddd0a7da162e542f6decd3d556f0bf SHA-256: 9899d0bbc314c9117b4e7006aecd47da1923208ef8c7a1804f8b9c031c75f722
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://gettraff.ru/strik?keyword=como+suprimir+las+preocupaciones+libro In PDF document text
    • https://cdn-cms.f-static.net/uploads/4379719/normal_5f8f22d78e024.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365589/normal_5f86f4053534e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/de3b44eb-80f6-44ff-b8f2-dd5bb2aea72b/lufokig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0354/3715/files/town_of_salem_crusader_vs_bodyguard.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5cfafb8-9563-481f-8c30-568a974fe17c/willingham_why_dont_students_like_school.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/les_anticorps_antiphospholipides.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2117/1879/files/geekvape_aegis_legend_user_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/5734/8247/files/69336789057.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/6238/1729/files/why_did_katniss_kill_president_coin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31644e7c-bb23-485d-a8e0-082560acb6e5/65981031017.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5712ab23-07fa-47be-bfe6-0099c05520aa/48062692058.pdfIn PDF document text
    • https://s3.amazonaws.com/tosasugokod/canon_pixma_mg2520_ink_walmart.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79892275-888b-4b85-acf6-ebe0f84c3cf1/xokalizugajape.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/9680/5028/files/dash_egg_cooker_poached_instructions.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008be1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BE1 5044 bytes
SHA-256: 4ed4123f8915ff67c91ae89f50819086a42af9077cc80a30165435be9f284c3f
font_01_sfnt_off00009ce2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9CE2 12332 bytes
SHA-256: f9fae06d3434f2c9c046dcc06b719d48199a7b7a19b714247a0bc41600c2f31c
font_02_sfnt_off0000c4da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4DA 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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